Fintech apps do not operate in isolation. A payments app integrates with merchant POS systems. A banking app connects to payroll providers. An investment app links to tax preparation software. Deep links enable these integrations by giving partners a reliable way to send users into specific screens of your app with the right context.<\/p>\n\n\n\n
This guide covers deep linking patterns for fintech partner integrations. For webhook-based integrations, see webhooks and integrations for deep linking<\/a>. For co-marketing partnerships, see partnership and co-marketing for mobile apps<\/a>.<\/p>\n\n\n\n A merchant's checkout links to your payment app:<\/p>\n\n\n\n The deep link opens the payment confirmation screen with the merchant name, amount, and order reference pre-filled.<\/p>\n\n\n\n A payroll provider links to your banking app for direct deposit setup:<\/p>\n\n\n\n A tax preparation app links to your investment app for tax document retrieval:<\/p>\n\n\n\n An insurance partner links to your banking app for premium payments:<\/p>\n\n\n\n These are links that partners use to send users into your app.<\/p>\n\n\n\n A merchant sends a payment request that opens your payment app:<\/p>\n\n\n\n A partner app (e.g., a budgeting tool) links to your banking app to initiate account linking via Open Banking<\/a> or Plaid<\/a>:<\/p>\n\n\n\n The deep link opens a consent screen where the user approves sharing specific data with the partner. After consent, the app redirects back to the partner via the callback URL.<\/p>\n\n\n\n These are links your app uses to send users to partner apps.<\/p>\n\n\n\n When your banking app needs to send the user to a partner's app (e.g., for insurance quotes):<\/p>\n\n\n\n After the user completes an action in a partner app, the partner sends them back:<\/p>\n\n\n\n Handle the callback:<\/p>\n\n\n\n Embedded finance is when financial services are built into non-financial apps. A ride-sharing app might embed a debit card. An e-commerce app might embed BNPL. Deep links connect the embedded experience to the underlying financial app.<\/p>\n\n\n\n A user has an embedded debit card in a ride-sharing app and wants to manage it in the full banking app:<\/p>\n\n\n\n A user who used BNPL at checkout wants to manage their payment plan:<\/p>\n\n\n\n Partners can trigger deep links to your users via webhooks<\/a>. The partner sends a webhook to your server, and your server sends a push notification with a deep link to the relevant user.<\/p>\n\n\n\n Partner deep links should include a signature or token to prevent spoofing:<\/p>\n\n\n\n Validate the signature server-side before processing the payment:<\/p>\n\n\n\n Partners should only be able to deep link to routes they are authorized to access. Maintain an allowlist per partner:<\/p>\n\n\n\n Reject deep links from partners that try to access unauthorized routes.<\/p>\n\n\n\n Tolinku<\/a> supports the route patterns partner integrations need. Define partner-specific routes in the Tolinku dashboard<\/a> and use webhooks<\/a> to trigger deep link delivery when partner events occur.<\/p>\n\n\n\n For fintech deep linking, see deep linking for fintech and banking apps<\/a>. For webhook integrations, see webhooks and integrations for deep linking<\/a>.<\/p>\n","protected":false},"excerpt":{"rendered":" Connect fintech partners via deep links. Enable merchant integrations, embedded finance, and cross-app financial experiences with deep linking.<\/p>\n","protected":false},"author":2,"featured_media":1703,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"rank_math_title":"Fintech Partner Integrations with Deep Links","rank_math_description":"Connect fintech partners via deep links. Enable merchant integrations, embedded finance, and cross-app experiences.","rank_math_focus_keyword":"fintech partner deep links","rank_math_canonical_url":"","rank_math_facebook_title":"","rank_math_facebook_description":"","rank_math_facebook_image":"https:\/\/tolinku.com\/blog\/wp-content\/uploads\/2026\/03\/og-fintech-partner-integrations-deep-links.png","rank_math_facebook_image_id":"","rank_math_twitter_title":"","rank_math_twitter_description":"","rank_math_twitter_image":"https:\/\/tolinku.com\/blog\/wp-content\/uploads\/2026\/03\/og-fintech-partner-integrations-deep-links.png","footnotes":""},"categories":[18],"tags":[62,20,509,59,263,69,510,61],"class_list":["post-1704","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-use-cases","tag-api","tag-deep-linking","tag-embedded-finance","tag-fintech","tag-integrations","tag-mobile-development","tag-partnerships","tag-webhooks"],"_links":{"self":[{"href":"https:\/\/tolinku.com\/blog\/wp-json\/wp\/v2\/posts\/1704","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/tolinku.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/tolinku.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/tolinku.com\/blog\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/tolinku.com\/blog\/wp-json\/wp\/v2\/comments?post=1704"}],"version-history":[{"count":3,"href":"https:\/\/tolinku.com\/blog\/wp-json\/wp\/v2\/posts\/1704\/revisions"}],"predecessor-version":[{"id":2681,"href":"https:\/\/tolinku.com\/blog\/wp-json\/wp\/v2\/posts\/1704\/revisions\/2681"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/tolinku.com\/blog\/wp-json\/wp\/v2\/media\/1703"}],"wp:attachment":[{"href":"https:\/\/tolinku.com\/blog\/wp-json\/wp\/v2\/media?parent=1704"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/tolinku.com\/blog\/wp-json\/wp\/v2\/categories?post=1704"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/tolinku.com\/blog\/wp-json\/wp\/v2\/tags?post=1704"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Partner Integration Patterns<\/h2>\n\n\n\n
Merchant to Payment App<\/h3>\n\n\n\n
https:\/\/links.payapp.com\/pay?merchant=MERCH-123&amount=45.00¤cy=USD&ref=ORDER-789\n<\/code><\/pre>\n\n\n\nPayroll to Banking App<\/h3>\n\n\n\n
https:\/\/links.bankapp.com\/direct-deposit\/setup?provider=acme-payroll&employee_id=EMP-456\n<\/code><\/pre>\n\n\n\nTax Software to Investment App<\/h3>\n\n\n\n
https:\/\/links.investapp.com\/documents\/tax?year=2025&type=1099\n<\/code><\/pre>\n\n\n\nInsurance to Banking App<\/h3>\n\n\n\n
https:\/\/links.bankapp.com\/payments\/make?payee=safe-insurance&amount=150.00&frequency=monthly\n<\/code><\/pre>\n\n\n\nRoute Patterns for Partner Deep Links<\/h2>\n\n\n\n
\/partner\/{partner-id}\/action \u2192 Partner-specific action\n\/pay \u2192 Payment initiation\n\/pay\/request\/{request-id} \u2192 Respond to payment request\n\/connect\/{service} \u2192 Connect to external service\n\/connect\/{service}\/callback \u2192 Return from external service\n\/documents\/{type} \u2192 Document retrieval\n\/accounts\/link \u2192 Account linking flow\n<\/code><\/pre>\n\n\n\nInbound Partner Deep Links<\/h2>\n\n\n\n
Payment Request Deep Link<\/h3>\n\n\n\n
{\n "title": "Payment request from Coffee Shop",\n "body": "Coffee Shop is requesting $4.50",\n "deep_link": "https:\/\/links.payapp.com\/pay\/request\/REQ-123",\n "category": "payment_request"\n}\n<\/code><\/pre>\n\n\n\nfunc handlePaymentRequestDeepLink(_ url: URL) {\n guard authManager.isAuthenticated else {\n pendingDeepLink = url\n showLogin()\n return\n }\n\n let segments = url.pathComponents\n\n \/\/ \/pay\/request\/{request-id}\n guard segments.contains("request"), let requestId = segments.last else {\n showPaymentHome()\n return\n }\n\n Task {\n do {\n let request = try await paymentAPI.getRequest(requestId)\n\n guard request.status == .pending else {\n showError("This payment request has already been handled.")\n return\n }\n\n showPaymentConfirmation(\n merchant: request.merchantName,\n amount: request.amount,\n currency: request.currency,\n reference: request.reference\n )\n } catch {\n showError("Payment request not found.")\n }\n }\n}\n<\/code><\/pre>\n\n\n\nAccount Linking<\/h3>\n\n\n\n
https:\/\/links.bankapp.com\/accounts\/link?partner=budget-app&scope=transactions,balance&callback=budgetapp:\/\/linked\n<\/code><\/pre>\n\n\n\nOutbound Partner Deep Links<\/h2>\n\n\n\n
Opening a Partner App<\/h3>\n\n\n\n
func openPartnerApp(_ partner: Partner, context: [String: String]) {\n var components = URLComponents(string: partner.deepLinkBase)\n components?.queryItems = context.map { URLQueryItem(name: $0.key, value: $0.value) }\n\n guard let url = components?.url else { return }\n\n if UIApplication.shared.canOpenURL(url) {\n UIApplication.shared.open(url)\n } else {\n \/\/ Partner app not installed, open web fallback or app store\n UIApplication.shared.open(partner.webFallbackURL)\n }\n}\n<\/code><\/pre>\n\n\n\nReturn Deep Links (Callbacks)<\/h3>\n\n\n\n
https:\/\/links.bankapp.com\/connect\/insurance\/callback?policy_id=POL-789&status=active\n<\/code><\/pre>\n\n\n\nfunc handlePartnerCallback(_ url: URL) {\n guard authManager.isAuthenticated else {\n pendingDeepLink = url\n showLogin()\n return\n }\n\n let params = URLComponents(url: url, resolvingAgainstBaseURL: false)?.queryItems\n let service = url.pathComponents[safe: 2]\n\n switch service {\n case "insurance":\n let policyId = params?.first(where: { $0.name == "policy_id" })?.value\n let status = params?.first(where: { $0.name == "status" })?.value\n\n if status == "active", let policyId = policyId {\n showInsuranceConfirmation(policyId: policyId)\n }\n case "payroll":\n let setupStatus = params?.first(where: { $0.name == "status" })?.value\n if setupStatus == "complete" {\n showDirectDepositConfirmation()\n }\n default:\n showHome()\n }\n}\n<\/code><\/pre>\n\n\n\nEmbedded Finance Deep Links<\/h2>\n\n\n\n
From Embedded Card to Full Banking App<\/h3>\n\n\n\n
https:\/\/links.bankapp.com\/cards\/CARD-EMBED-123?source=rideshare-app\n<\/code><\/pre>\n\n\n\nFrom BNPL Widget to Full App<\/h3>\n\n\n\n
https:\/\/links.bnplapp.com\/plans\/PLAN-456?source=merchant-checkout\n<\/code><\/pre>\n\n\n\nWebhook-Triggered Deep Links<\/h2>\n\n\n\n
Flow<\/h3>\n\n\n\n
\n
\/\/ Incoming webhook from partner\n{\n "event": "document_ready",\n "partner": "tax-prep-co",\n "user_reference": "USR-123",\n "document_type": "1099",\n "tax_year": 2025\n}\n\n\/\/ Your server sends this push notification\n{\n "title": "Tax document ready",\n "body": "Your 2025 1099 form is available from Tax Prep Co",\n "deep_link": "https:\/\/links.investapp.com\/documents\/tax?year=2025&type=1099",\n "category": "partner_document"\n}\n<\/code><\/pre>\n\n\n\nSecurity for Partner Deep Links<\/h2>\n\n\n\n
Validating Partner Requests<\/h3>\n\n\n\n
https:\/\/links.payapp.com\/pay?merchant=MERCH-123&amount=45.00&sig=hmac_sha256_signature\n<\/code><\/pre>\n\n\n\nfunc validatePartnerDeepLink(_ url: URL, partner: Partner) -> Bool {\n guard let params = URLComponents(url: url, resolvingAgainstBaseURL: false)?.queryItems else {\n return false\n }\n\n let signature = params.first(where: { $0.name == "sig" })?.value\n let payload = params\n .filter { $0.name != "sig" }\n .sorted { $0.name < $1.name }\n .map { "\\($0.name)=\\($0.value ?? "")" }\n .joined(separator: "&")\n\n let expectedSignature = hmacSHA256(payload, key: partner.secretKey)\n return signature == expectedSignature\n}\n<\/code><\/pre>\n\n\n\nScoping Partner Access<\/h3>\n\n\n\n
let partnerRouteAllowlist: [String: [String]] = [\n "acme-payroll": ["\/direct-deposit\/setup"],\n "tax-prep-co": ["\/documents\/tax"],\n "safe-insurance": ["\/payments\/make", "\/connect\/insurance\/callback"]\n]\n<\/code><\/pre>\n\n\n\nTolinku for Partner Integrations<\/h2>\n\n\n\n